Heading down there for vacation, looked up the laws but I can't seem to find a definitive answer.

This site seems good until you actually try to use the contact information they listed to contact the Mexican government. So no way for me to get a direct answer.
https://uavcoach.com/drone-laws-in-mexico/

Then this one says the same thing as the first site but it doesn't link to a source. Not sure if it's truly up to date.
https://uavsystemsinternational.com/pages/mexico-drone-laws

And after a bit of digging I came across this document completely in Spanish.. damn. Not to mention it's dated to July 25th 2017.
http://www.sct.gob.mx/fileadmin/DireccionesGrales/DGAC-archivo/modulo3/co-av-23-10-r4.pdf

So that brings me here where I defer to someone that's flown in Mexico/Cancun. Can someone help verify if I got the law/guidelines right? Or link to actual laws/better websites. I really do appreciate any insight. When it comes to Mavic mini I have no clue if these rules apply. I would assume yes.. except for registration and the receipt?

-drones over 250 grams have to be registered to be flown and can ONLY be done if you're a Mexican citizen
-carry receipts for your drone when bringing it into the country to avoid being charged VAT on the drone
-no flying at historical sites
-fly in daylight, maintain VLOS
-stay 9.2 km away from aerodomes
-don't fly over people

Hi. Thank you for reaching out and for these information.  I hope you'll get the best information and recommendations here from our valued DJI Members and Customers who traveled in Mexico and brought the DJI drone with them. In addition I will be posting a link where in you can check locations in Mexico ( https://www.dji.com/flyingtips?site=brandsite&from=nav ) where in you can fly your drone freely and if the said location is a no fly zone ( NFZ ). In addition I will be posting a link where in you can check some DJI Flying Tips ( https://www.dji.com/flyingtips?site=brandsite&from=nav ). Thank you and please be safe always.

Did you ever get any answers? I am going in a few weeks.

Shantok Posted at 1-21 18:28
Did you ever get any answers? I am going in a few weeks.

No I ended up flying on beaches/in the city and honestly no one cared at all. There were a ton of other people flying as well (Mavic/Phantom etc). If I could give you some advice, just be wary of the wind. Was windy like 80% of the time I was there.

Thanks for the advice. It always windy where I live so use to it.

Hi
I was there few weeks ago and didn't have any problems. In some places (cenotes, ruins) there was "no drone" signs. Even police didn't care. In Tulum I have to request license thru DJI web page to be able to take off because of the airport "blue zone", but that was only few clicks.

This may be a good article to check out. MEXICO DRONE LAWS

You can try this too:
worldwide drone laws

There is a section called Resources that has a Spanish PDF that may be useful. There are multiple ways to convert it to English (or whatever).